Display screen with a graphical user interface



FIG. 1 is a front view of an electronic device with a display screen with a graphical user interface; and,

FIG. 2 is a front view of an electronic device with a display screen with a graphical user interface.

The outermost broken lines illustrate an electronic device, which is the environment of the design, and form no part of the claimed design. The remaining broken lines illustrate portions of the display screen and portions of the graphical user interface that form no part of the claimed design. 

CLAIM The ornamental design for a display screen with a graphical user interface, as shown and described. 